 Detects a moving vehicle at 16 km and a walking person at more than 7 km
 360° surveillance with PESA e-scan performance
 Long life, maintenance-free positioner
 Wide 20° continuous elevation coverage
 (40° coverage via mechanical elevation control)
 Non-rotational central post for mast-top camera mounting
 Supports both continuous ‘scan & pan’ and ‘stare’ surveillance modes
 Full 360° ‘scan in just 20 seconds
 Ultra-high reliability positioner
 High performance servo motor

SKU ST-ESR360-1 Category
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The ST-ESR360 Radar is fitted with W20S wide elevation beam antennas This configuration offers maximum performance in the most compact size, with the 20° wide elevation beam being ideal for mobile deployment in hilly and mountainous areas.The radar can detect a single walking person at distances of up to 7.4 km, over 360° (in four 90° quadrants). However, in typical deployments faster scanning modes may be used to reduce the target revisit time to a minimum.
SensorTec ST-ESR360 can achieve a full 360° ‘scan & pan’ surveillance in just 20 seconds.SensorTec’s coactive FMCW Doppler fast-scan processing detects small and slow moving targets in a single 90° electronic-sweep, meaning that it can then immediately move onto the next 90° quadrant.
The cable-drive positioner uses a compact yet high performance servo motor allowing the positioner and radar to be optimally accelerated and decelerated between surveillance quadrants. The positioner has four precisely defined set positions, each at 90° to one another so that the radar is precisely pointed in each one of its 90° ‘scan & pan’ surveillance quadrants. For surveillance over a narrow sector of less than 90°, the positioner is made to stare at any azimuth angle so that the radar’s PESA escan beam is centred about the area of interest.

Electronic-scanning (E-Scan)

The SensorTec ST-ESR138 is a low cost e-scan ground surveillance radar (GSR). SensorTec e-scan radars have no moving parts to wear out, maintain or replace and offer dramatic improvements in reliability over mechanically scanned radars. SensorTec radars are all-in-one fully integrated units comprising antennas, signal processing, plot extractor, GPS and compass. SensorTec radars are proven to withstand harsh environmental conditions and provide many years of maintenance free operation. The radar operates in all weather conditions and includes a built-in precipitation filter that suppresses false detections from rain or snow. Day/night 24- hour operation is fully supported.

Low-power FMCW Doppler Technology

SensorTec radars incorporate a unique combination of FMCW and Doppler processing technology, ensuring unsurpassed ground clutter cancellation with the ability to detect incredibly slow movement. Radio transmission power is very low, making the radar safe for human operation and difficult to intercept (i.e. electronically covert). Power consumption is low, allowing operation from battery, vehicle or mains.

Architectural Overview

Radar type E-scan Frequency Modulated Continuous Wave (FMCW) Doppler Ground Surveillance Radar Frequency band: Ku band Spectrum occupancy: Wide-band (WB): 15.7 to 17.2 GHz | Narrow-band (NB): 16.2 to 17.2 GHz
Scan type: electronic scanning in azimuth (‘e-scan’) using a Passive Electronically Scanned Array (PESA)
Pan type: fully integrated cable drive positioner allowing 360° surveillance
Transmitter power (nominal) 1 Watt (standard power transmitter version) or 4 Watt (high power transmitter version)
Multi-radar operation supported and unlimited
Embedded software and firmware field upgradeable via network connection

Target Detection Performance

Maximum targets per scan: 700
Maximum detection ranges: Crawling person (RCS 0.1 m2): 3.2 km (2.0 mi.)*
Walking person (RCS 1 m2): 7.4 km (4.6 mi.)*
Moving RIB (RCS 5 m2): 14.2 km (8.9 mi.)*
Moving vehicle (RCS 30 m2): 16.0 km (9.9 mi.)*
Large moving vehicle (RCS 100 m2): 22.1 km (13.7 mi.)
Large moving vessel (RCS 1000 m2): 32.0 km (19.9 mi.)
False Alarm Rate (FAR): 1 false alarm per day
Minimum detectable target radial velocity: 0.37 km/h (0.23 mph)


Instrumented maximum range: 2, 5, 8, 16 or 32 km (1.2, 3.1, 5.0, 9.9 or 19.9 mi.)
Instrumented minimum range: less than 10 m (33 ft.)
Azimuth scan angle: 90° horizontal e-scan; 360° via integrated positioner
Elevation beam: 20° vertical elevation beamwidth
Elevation adjustment: +10° to -10° (manual)
Fastest scan time (for 90°): 1 s (manual)
Fastest ‘scan & pan’ time (for 360°): 20 s

Target Output & Identification

Data format QZ (custom, open standard data format)
Target output port available for cueing of pan/tilt-mounted cameras and thermal imagers
Doppler audio modes optional

Connectivity & Software

Main I/O interface (for radar control and target data): 10/100 Ethernet network interface
Auxiliary I/O interfaces: RS-232 and RS-422 control lines, opto-isolated control/status inputs and isolated switched contact outputs
Software (SDK) API software library (Windows) and generic Interface Control Document (ICD) are both available to System Integrators


Battery/regulated PSU input range: from 24 V to 28 V (DC)
Vehicle supply input: 24 V (DC)
Power consumption (from 28 V regulated PSU)*: 70 W (average)
Endurance*: 10 to 14 hours continuous operation from quad BB-2590 batteries
SP version: (HP version consumes 135 W)

Physical, Environmental & Reliability

External dimensions of radar unit (W x H x D)*: 666 mm x 503 mm x 128 mm**
(26.2 in. x 19.8 in. x 5.0 in.)
Weight SensorTec ST-ESR360 radar system (approx.): Wide-band (WB): 50 kg (110 lb.)
Narrow-band (NB): 52 kg (115 lb.)
Operating temperature: from -32° C to +60° C (from -25° F to +140° F)
Note: extended operating temperature version available
IP rating: IP66 (dust tight and protected against powerful water jets)
MTBF > 65,000 h (zero maintenance)

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